1*7c3d14c8STreehugger Robot //===-- sanitizer_asm.h -----------------------------------------*- C++ -*-===// 2*7c3d14c8STreehugger Robot // 3*7c3d14c8STreehugger Robot // The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot // 5*7c3d14c8STreehugger Robot // This file is distributed under the University of Illinois Open Source 6*7c3d14c8STreehugger Robot // License. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot // 8*7c3d14c8STreehugger Robot //===----------------------------------------------------------------------===// 9*7c3d14c8STreehugger Robot // 10*7c3d14c8STreehugger Robot // Various support for assemebler. 11*7c3d14c8STreehugger Robot // 12*7c3d14c8STreehugger Robot //===----------------------------------------------------------------------===// 13*7c3d14c8STreehugger Robot 14*7c3d14c8STreehugger Robot // Some toolchains do not support .cfi asm directives, so we have to hide 15*7c3d14c8STreehugger Robot // them inside macros. 16*7c3d14c8STreehugger Robot #if defined(__clang__) || \ 17*7c3d14c8STreehugger Robot (defined(__GNUC__) && defined(__GCC_HAVE_DWARF2_CFI_ASM)) 18*7c3d14c8STreehugger Robot // GCC defined __GCC_HAVE_DWARF2_CFI_ASM if it supports CFI. 19*7c3d14c8STreehugger Robot // Clang seems to support CFI by default (or not?). 20*7c3d14c8STreehugger Robot // We need two versions of macros: for inline asm and standalone asm files. 21*7c3d14c8STreehugger Robot # define CFI_INL_ADJUST_CFA_OFFSET(n) ".cfi_adjust_cfa_offset " #n ";" 22*7c3d14c8STreehugger Robot 23*7c3d14c8STreehugger Robot # define CFI_STARTPROC .cfi_startproc 24*7c3d14c8STreehugger Robot # define CFI_ENDPROC .cfi_endproc 25*7c3d14c8STreehugger Robot # define CFI_ADJUST_CFA_OFFSET(n) .cfi_adjust_cfa_offset n 26*7c3d14c8STreehugger Robot # define CFI_DEF_CFA_OFFSET(n) .cfi_def_cfa_offset n 27*7c3d14c8STreehugger Robot # define CFI_REL_OFFSET(reg, n) .cfi_rel_offset reg, n 28*7c3d14c8STreehugger Robot # define CFI_OFFSET(reg, n) .cfi_offset reg, n 29*7c3d14c8STreehugger Robot # define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg 30*7c3d14c8STreehugger Robot # define CFI_DEF_CFA(reg, n) .cfi_def_cfa reg, n 31*7c3d14c8STreehugger Robot # define CFI_RESTORE(reg) .cfi_restore reg 32*7c3d14c8STreehugger Robot 33*7c3d14c8STreehugger Robot #else // No CFI 34*7c3d14c8STreehugger Robot # define CFI_INL_ADJUST_CFA_OFFSET(n) 35*7c3d14c8STreehugger Robot # define CFI_STARTPROC 36*7c3d14c8STreehugger Robot # define CFI_ENDPROC 37*7c3d14c8STreehugger Robot # define CFI_ADJUST_CFA_OFFSET(n) 38*7c3d14c8STreehugger Robot # define CFI_DEF_CFA_OFFSET(n) 39*7c3d14c8STreehugger Robot # define CFI_REL_OFFSET(reg, n) 40*7c3d14c8STreehugger Robot # define CFI_OFFSET(reg, n) 41*7c3d14c8STreehugger Robot # define CFI_DEF_CFA_REGISTER(reg) 42*7c3d14c8STreehugger Robot # define CFI_DEF_CFA(reg, n) 43*7c3d14c8STreehugger Robot # define CFI_RESTORE(reg) 44*7c3d14c8STreehugger Robot #endif 45*7c3d14c8STreehugger Robot 46*7c3d14c8STreehugger Robot #if !defined(__APPLE__) 47*7c3d14c8STreehugger Robot # define ASM_HIDDEN(symbol) .hidden symbol 48*7c3d14c8STreehugger Robot # define ASM_TYPE_FUNCTION(symbol) .type symbol, @function 49*7c3d14c8STreehugger Robot # define ASM_SIZE(symbol) .size symbol, .-symbol 50*7c3d14c8STreehugger Robot # define ASM_TSAN_SYMBOL(symbol) symbol 51*7c3d14c8STreehugger Robot # define ASM_TSAN_SYMBOL_INTERCEPTOR(symbol) symbol 52*7c3d14c8STreehugger Robot #else 53*7c3d14c8STreehugger Robot # define ASM_HIDDEN(symbol) 54*7c3d14c8STreehugger Robot # define ASM_TYPE_FUNCTION(symbol) 55*7c3d14c8STreehugger Robot # define ASM_SIZE(symbol) 56*7c3d14c8STreehugger Robot # define ASM_TSAN_SYMBOL(symbol) _##symbol 57*7c3d14c8STreehugger Robot # define ASM_TSAN_SYMBOL_INTERCEPTOR(symbol) _wrap_##symbol 58*7c3d14c8STreehugger Robot #endif 59